CVE-2026-4267
Query Monitor <= 3.20.3 - Reflected Cross-Site Scripting via Request URI
highImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
7.2
CVSS Score
7.2
CVSS Score
high
Severity
3.20.4
Patched in
1d
Time to patch
Description
The Query Monitor – The developer tools panel for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘$_SERVER['REQUEST_URI']’ parameter in all versions up to, and including, 3.20.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
CVSS Vector Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:NAttack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Low
Confidentiality
Low
Integrity
None
Availability
Technical Details
Affected versions
<=3.20.3PublishedMarch 30, 2026
Last updatedMarch 31, 2026
Affected pluginquery-monitor
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